test-evolve: extend output and exhibit an amend bug
The extended section shows the parent revision stabilizing itself on another revision, without --any. In theory, only descendants of the parent predecessors or of its descendants should be stabilized, and be stabilized in parent subtree. Unfortunately, stabilize implementation correctly picks the changesets to stabilize but not their target.
This problem is aggravated by amend registering too many obsolete markers which prevents the stabilize selection heuristic to prune several changesets.